运动后阻力运动强度对心脏自主神经调节的急性影响。

Acute effect of resistance exercise intensity in cardiac autonomic modulation after exercise.

机构信息

Escola Superior de Educação Física, Universidade de Pernambuco, Recife, PE, Brazil.

出版信息

Arq Bras Cardiol. 2011 Jun;96(6):498-503. doi: 10.1590/s0066-782x2011005000043. Epub 2011 Apr 15.

DOI:10.1590/s0066-782x2011005000043

PMID:21503389

Abstract

BACKGROUND

Cardiac sympathovagal balance is altered after resistance exercise. However, the impact of the characteristics of resistance training in this response remains unclear.

OBJECTIVE

Analyze the acute effect of resistance exercise intensity for trunk and upper limbs in cardiac autonomic modulation after exercise.

METHODS

Fifteen young men performed three experimental sessions in random order: control (C), resistance exercise with 50% of 1-RM (E50%) and resistance exercise with 70% of 1-RM (E70%). The sessions included 05 exercises for the trunk and upper limbs performed in three sets of 12, 9 and 6 repetitions, respectively. Before and at 20 and 50 minutes after the interventions, the heart rate was measured for spectral analysis of variability.

RESULTS

In comparison to the values before the intervention, the RR interval and the band of high frequency (HF) increased (major changes: + 112 ± 83 ms; +10 ± 11 un, respectively, p < 0.01), while the low frequency band (LF) and LF/HF ratio decreased (major changes: -10 ± 11 pc; -2 ± 2, respectively, p < 0.01) after the session C. None of these variables changed significantly after the E50% session (p > 0.05). Compared to pre-exercise values, the RR interval and the HF band decreased (major changes: -69 ± 105 ms; -13 ± 14 un, respectively, p <0.01), while the LF band and the LF/HF ratio increased (major changes: -13 ± 14 un, 13 ± 3 14 ± 3 and un, respectively, p <0.01) after E70%.

CONCLUSION

The higher intensity of resistance exercise for trunk and upper limbs promoted, in an acute manner, greater increase in cardiac sympathovagal balance after exercise.

摘要

背景

抗阻运动后心脏交感神经迷走神经平衡发生改变。然而，抗阻训练特点对运动后心脏自主神经调节的影响尚不清楚。

目的

分析抗阻运动强度对躯干和上肢运动后心脏自主神经调制的急性影响。

方法

15 名年轻男性以随机顺序进行 3 次实验：对照（C）、50%1 次重复最大阻力（E50%）和 70%1 次重复最大阻力（E70%）。每组包括 5 种用于躯干和上肢的运动，分别进行 3 组，每组 12、9 和 6 次重复。在干预前和干预后 20 分钟和 50 分钟测量心率，进行变异性的频谱分析。

结果

与干预前相比，RR 间期和高频带（HF）增加（主要变化：+112±83ms；+10±11un，p<0.01），而低频带（LF）和 LF/HF 比值降低（主要变化：-10±11pc；-2±2，p<0.01）。C 组干预后，这些变量均无明显变化（p>0.05）。与运动前相比，E70%后 RR 间期和 HF 带降低（主要变化：-69±105ms；-13±14un，p<0.01），而 LF 带和 LF/HF 比值升高（主要变化：-13±14un，13±3 14±3 和 un，p<0.01）。